US Surgeon General Vivek Murthy recommended adding cancer warnings to alcohol on Friday.Burazin/Getty, Don Wu/Getty, Tyler Le/BIThe US Surgeon General recommended disclosing the cancer risk of alcoholic beverages on Friday.While just a recommendation, the advisory sent shares of some big alcohol manufacturers lower.It also presents a fresh opportunity for makers of alternatives to alcohol.The US Surgeon General's finding Friday that alcohol causes cancer led to stock declines for some of the beverage industry's biggest names — and an opportunity for some newer entrants.Drinking is a major cause of preventable cancer, Dr.